MEASURING THE RESOLVING POWER OF ION MOBILITY SPECTROMETERS
MEASURING THE RESOLVING POWER OF ION MOBILITY SPECTROMETERS
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DOI：
10.1021/ac00095a014
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发表时间：
1994-12-01
影响因子：
7.4
通讯作者：
MCMINN, DG
中科院分区：
文献类型：
--
作者：
SIEMS, WF;WU, C;MCMINN, DG
离子迁移谱峰宽数据拟合的最小二乘法程序的半经验模型有三个可调参数。峰宽比从初始脉冲宽度和扩散预测的贡献，并建议，额外的宽度主要是由于电场的不均匀性和库仑排斥。讨论了操作条件和仪器尺寸对分辨率的影响。有人提出，电场的不均匀性增加的结果在较低的测量迁移率值，以及较低的分辨率。
Ion mobility spectrometry peak width data are fitted by a least-squares procedure to a semiempirical model having three adjustable parameters. Peaks are wider than contributions from initial pulse width and diffusion predict, and it is suggested that the additional width is due mainly to electric field inhomogeneity and Coulombic repulsion. The effects of operating conditions and instrument dimensions on resolving power are discussed. It is proposed that increased inhomogeneity of the electric field results in lower measured mobility values, as well as lower resolving power.